Planetary Questions

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majornature

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If Venus had a large single satellite (moon), will the physical features change such as the atmosphere? <br /><br />Will it affect the length of day and the rotation?<br /><br />Is there a possible chance for life to evolve?<br /><br />Can it be possible for earthlings to occupy the planet? <br /><br /><b><font color="black">True Knowledge Exists in Knowing That You Know Nothing!!!!!</font>/b></b> <div class="Discussion_UserSignature"> <font size="2" color="#14ea50"><strong><font size="1">We are born.  We live.  We experiment.  We rot.  We die.  and the whole process starts all over again!  Imagine That!</font><br /><br /><br /><img id="6e5c6b4c-0657-47dd-9476-1fbb47938264" style="width:176px;height:247px" src="http://sitelife.space.com/ver1.0/Content/images/store/14/4/6e5c6b4c-0657-47dd-9476-1fbb47938264.Large.jpg" alt="blog post photo" width="276" height="440" /><br /></strong></font> </div>
 
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nexium

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Venus is likely too close to the sun to have temperatures below 212 f =100 degrees c at the poles even with as thin an oxygen/nitrogen atmosphere as Earth and less green house gas such as water vapor, methane and carbon dioxide, than Earth has. A large moon would slow the rotation making the day even longer, but would have very little effect on the average temperature of Venus. Life as we know it would not be possible on Venus in my opinion. Neil
 
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qso1

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To add to what Nexium has accurately pointed out, Venus is simply in the wrong place in its orbit around the sun. It lies outside that so called "Goldilocks" zone where conditions favor the development of earthlike planets so long as the planets themselves develop habitable atmospheric and lithospheric (Surface) conditions that also support the development of life. <div class="Discussion_UserSignature"> <p><strong>My borrowed quote for the time being:</strong></p><p><em>There are three kinds of people in life. Those who make it happen, those who watch it happen...and those who do not know what happened.</em></p> </div>
 
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newtonian

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majornature - Concerning life on Venus, and our ability to colonize it:<br /><br />First, while not a creationist, I believe in creation and not in macroevolution - so the question for me would be: could life be created on Venus and undergo microevolution?<br /><br />Perhaps, for some types of extremophiles we are not aware of.<br /><br />This would be more likely in the atmosphere or perhaps in cooler pockets deep within Venus - What are Venutian core and mantle temperatures?<br /><br />Venus' Atmosphere is about the same temperature as Earth's atmosphere at an elevation of 100 km: 180K. Earth's atmosphere is 180K at 85km. <br /><br />Above this zone earth and venus have a thermosphere - though earth's ozone layer (now depleted seriously) is unique in absorbing solar radiation and raising the thermosphere temperature to very much hotter than either Venus or Mars.<br /><br />Of course, ozone depletion would not only cool earth's upper atmosphere but also heat earth's surface - solar radiation once absorbed higher in the atmosphere is now being absorbed (beware of skin cancer) on the surface.<br /><br />Above 100 km Venus "on the daylight side, solar radiation heats the thermosphere to about 300K, but over the dark hemisphere the temperature of the upper atmosphere drops to about 100K." - "The World of Science," 1991, volume 7, page 56.<br /><br />Perhaps some extremophiles could be created that would survive in Venus' atmosphere.<br /><br />As to survival for earthlings on Venus - see my thread on surviving on earth during red giant phase.<br /><br />The temperature on Venus' surface now may approximate the temperature on earth's surface at that time.<br /><br />On would need sufficient mass and insulation layers to maintain a survivable zone.<br /><br />Earthlings will have billions of years to construct such zones on earth [if it gets that hot] - but for Venus you would have to start from scratch - way much more difficult.<br /><br />And watch out for that sulphuric acid!!!!!
 
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qso1

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Good points, extremophiles could yet be discovered in the atmosphere of Venus. <div class="Discussion_UserSignature"> <p><strong>My borrowed quote for the time being:</strong></p><p><em>There are three kinds of people in life. Those who make it happen, those who watch it happen...and those who do not know what happened.</em></p> </div>
 
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agnau

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A significant satellite could affect physical processes (such as the rotation mentioned in another post) similarly to the way that the moon affects the tide and wind.<br /><br />This said, supposing one could move a significant mass into a stable orbit around Venus, these processes could trigger increased precipitation of the current clouds, erosion, and possibly set off a chain of chemical reactions not yet in existence on present day Venus.
 
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alokmohan

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Theoriticlly possible.So far no evidece possible.In fact no life has been found other than earth.
 
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alokmohan

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Astrobiology deals with all these,withot data so far.
 
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nexium

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The core and mantle of Venus (or any other planet) send heat to the surface, so I can think of no way the core nor mantle could be cooler than the cooler portions of the surface. 500 degrees c = 932 f is likely the coolest temperature found anywhere in the core or mantle of Venus. Neil
 
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